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Table 2 Production of nitrite and nitrous oxide from nitrate or ammonium per strain (n = 2)

From: Niche differentiation in nitrogen metabolism among methanotrophs within an operational taxonomic unit

   dNMS (10 mM KNO3) cultivation dAMS (10 mM NH4Cl) cultivation Phenotype
   NO2 production N2O production NO2 & N2Oa NO2 production N2O production  
M. methanica NCIMB 11130T + + - - + I
  R-45362 + + + - + II
  R-45363 - - - - + III
  R-45364 + + - - + I
  R-45371 +/−b + - +/−b + IV
  R-45372 + + + - + II
  R-45374 + + + - + II
M. koyamae NCIMB 14606T + + + - + II
  R-45378 + + + - + II
  R-45383 + - - - - V
  R-49799 + + + - + II
  R-49807 + + + - - VI
M. lenta R-45370 + + Ntc +/−b + VII
  R-45377 + Ntc Ntc +/−b + VII
Type Ib R-49797 + + + - + II
Type II R-45379 + + - + + VIII
  1. aObserved decline in NO2 levels and corresponding rise in N2O levels over time.
  2. b+, positive result (>10 μM NO2 or N2O-N); −, negative result (<10 μM NO2 or N2O-N); +/−, Values around the detection limit of the assay (10 μM);
  3. cNt, Not tested due to slow growth of the strain.